问题
选择题
When people move to another country, they often try ________ the customs of their native land.
A．to keep on
B．to keep off
C．to keep up
D．keeping up
答案
答案：C
keep on意为“继续”。keep off意为“使离开”。keep up意为“保持，维持”。try to do sth意为“努力做某事”；try doing sth.意为“试着做某事（看行不行）”。